Typewriting machine



Oct. 31, 1933.

D, L. SHELT'ON ET AL TYPEWRITING MACHINE Filed Dec. 8, 1931 10 Sheets-Sheet \NNmmN Inventors; @maw k /r zzw 1 UL. SHELTON ET AL 1,932,914

TYPEWRITING MACHINE Filed Dec. 8, 1951 10 Sheets-Sheet 2 STHRSPACEBNGT EIUIE jig. Z; Inmen ibrs:

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Oct. 31, 1933- D. L. SHELTON ET AL TYPEWRITING MACHINE Filed Dec. 8, 1931 10 Sheets-Sheet 3 QNN sNw

0.131, 193 D. L. SHELTON ET AL TYPEWRITING MACHINE Filed Dec. 8, 1931 10 Sheets-Sheet 4 Inventors: WMX M 1933- D. SHELTON ET AL TYPEWRITING MACHINE Filed D es. a, 19:51

10 Sheets-Sheet 5 n mw flMmw EN A -3 ,1933. .D, L. sumo: ETAL' 1,932,914

TYPEWRIT ING MACHINE Filed Dec. 8. 193]. l0 Sheets-Sheet 6 [Wu QM L Mm D. L. SHELTON ET'AL 1,932,914

TYPEWRI'I'ING MACHINE Oct. 31, 1933.-

Filed Dec. 2%, 1931 10 Sheets- Sheet 7 Cd. 31, 1933. L. SHELTON' r AL 1,932,914-

TYPEWRITING MACHINE Filed Dec. 8, 1931 1ov Sheets-Sheet s I Inventors: QD aZMMJi ZU 1933. m. L. SHELTQN E AL 1,932,914

TYPEWRITING MACHINE Filed Dec. 8, 1931 10 Sheets-Sheet 9 Inventors:

Oct. 31, 1933.

D. L. SHELTON ET AL TYPEWRITING MACHINE File d Dec. 8, 1931 I 10 Sheets-Sheet 1o Mentors.-

Patented Oct. 31, i 1933 PATENT OFFICE mswmrmc mcnmn Dothan L. Shelton, Amarillo, Ten, and Gui-st '1. Shelton, Bradley, Ark.

Application December 8,

1931. Serial No. 579,811

14 Claims. (01. 19725) This invention relates to typewriting machines having means for actuating type bars and has for its object to provide an electrically operated typewriter that is automatic in its operation and so designed that it can be operated by finger movements at a speed in keeping with the spoken word. This is accomplished through novel means embodying a keyboard comprised of finger keys adapted to be operated either singly or in combinations for the purpose of registering in the machine single letters or combinations or letters comprising entire words or syllables, a selector mechanism cooperating with finger keys for the purpose of selecting letters or combinations of letters to be written, a releasing mechanism on which is registered the results of selector mechanism and which in turn imparts type selections to type bar actuating means for writing the letters or letter combinations selected, a timing means for causing selected type bars to operate in a consecutive order, a type basket comprised of two independent units adapted, to cooperate in such way that two type bars may be thrown into printing position simultaneously, a series of reciprocating type barsarcuately arrayed in two independent units and radiating from two independent writing centers, and power means for actuating type bars.

In the drawings:

Figure 1 is a sectional side elevation of a typewriting machine embodying the invention, showing internal construction.

Figure 2 is a plan view showing the keyboard Figure 11 is an isometric projection of a section of timer ball race with interlocking balls and timer plungers.

Figure 12 is an oblique projection of release rotor, timer plungers, and letter spacing mechae nism.

Figure 13 is a viewof left timer plunger and auxiliary plunger.

Figure 14 is a view of cylindrical section of release rotor showing slidable registering member as and spring detent. Figure 15 is an oblique actuating cam- Figure 16 is an elevational view of timer plungprojection of type bar er after it has'been tripped by release rotor 7 mechanism. I Figure 22 is an en view of certain essential g parts of. type basket spacing mec Figure 23 is a rearward elevation showing detailed construction of type basket spacing mechand the order of arrangement of finger keys withv amsm a sectional view of type basket, showing the arrangement of type bars-the division of type basket, the type basket spacing mechanism, and other related parts. t

Figure 3 is a side elevation of certain essential mechanisms, the frame and some of the mechanism of machine being omitted for the purpose of better illustration.

Figure 4 is a front elevation of keyboard.

Figure 5 is a plan view of medial letter finger keys and corresponding selector mechanism.

Figure 6 is a side elevation of same.

Figure '7 is a distended oblique view of selectormechanism shown in Figures 5 and 6.

Figure 8 is a rear sectional view showing positionof electric drive motor and means for driving power roller and release rotor, with one-round clutch and gear train.

Figure 9 is a sectional view of one-round clutch.

Figure is a view of clutch throwout lever showing cam face and detent.

Figure 24 is an oblique projection of same show- 90 ing structural details of certain parts. Figures 25,26, 27, and 28 show normal actuated views of platen positioning mechanism. Referring to the drawings, there. is disclosed a machine frame A, carriage B supporting the as usual platen C, an electric motor-D: with the usual circuit and switch E for closing and opening circuit. All these parts as well as the various other instrumentalities of the machine such as the capital shift, tabulating mechanism, carriage 10o drive and return mechanism, line feed, ribbon oscillator, and; other essential parts common to 'typewriting machines may be of any conventional or desired construction.

By referring to Figure 2 the keyboardconsists of forty-four finger keys, designated by the numeral 4, eight of which are function keys andthirty-six of which are type keys.

view showing the relative it will be observed that The nngerkeys are arranged inboth transverse 11 and longitudinal rows lying in three horizontal planes (see Figures 1, 2, and 4), the main body of the keyboard lying in the intermediate plane and having centrally located therein a space function key extending across the two central transverse rows. The keys immediately to the right and left of space key are placed in very close proximity thereto so that space key and letter keys may be depressed simultaneously with one finger, the finger being placed over the division between the keys and resting on both keys. The keys in longitudinal rows are placed in very close proximity to each other to facilitate the fingering of two keys simultaneously with one finger in. the

manner above explained.

The function keys serve to control the functions of letter spacing, tabulating, carriage return, capital shift, line space, back space, etc. The letter keys serve to control the operation of seventy-one bars more or less. 0f the letter keys thirteen are used in writing numerals, figures, and punctuation marks, the remaining twentythree being used in writing the letters of the alphabet.

The keys marked A, S, P, T, W, H, N, R, which are to the left of the space key and lie in the same horizontal plane are initial letter keys, they being used singly and in combinations to control the operation of type bars writing the initial letters.

The keys marked R, B, L, N, D, G, S, T, E, Y, which are to the right of the space key and lie in the same horizontal plane are known as final letter keys, they being used'to control the operation of type bars writing the final letters. The keys marked O, A, U, I, E, which are to the front and below the space key are medial letter keys, they being used to control the operation of type bars writing the medial letters.

The initial letters which consist chiefly of consonants are ordinarily used at the beginning of words or syllables, the medial letters which consist entirely of vowels are ordinarily used medially in words or syllables, and the final letters which consist chiefly of consonants are ordinarily used at the end of words or syllables.

It will be observed that all the letters of the alphabet do not appear on the keyboard, there being only eight initial letters shown, whereas there are twenty-one initial consonants and one vowel, making a total of twenty-two letters to be written on the eight initial letter keys. There are only ten final letters shown, whereas there are nineteen final consonants and one vowel in addition to fifteen sufiixes and special consonant combinations which have been provided to facilitate the writing of certain words, making a total of thirty-four letters, sufiixes, and special consonant combinations that must be written on the final letter keys. It has also been found necessary in order to facilitate the writing of certain words to provide nine special vowel combinations in addition to the five vowels shown on the medial letter keys, making a total of fourteen vowels and special vowel combinations to be written on the five medial letter keys. These letters and letter combinations which do not appear on the keyboard are written by means of combination of keys instead of single keys as in the case of the letters shown on the keyboard, the machine being so constructed that the simultaneous operation of certain keys, instead of writing the several letters represented by the single keys, will write another letter or combination of letters.

To better explain this feature of the invention,

there is provided below a table showing the character to be written and the finger key or combination of keys used in writing the character, the left column headed Characters giving the character or letter to be written and the right column headed Keys giving the finger key or; keys used in the writing of the corresponding letter or character.

Numerals and figures Characters. Keys Initial letters B- PTWH C PW D PT F PTH G SPT H H J WHNR K TWH L NR M WN N N P P Q L HR R R S S T T V S'I'H W W X WHR Y SR z PWN Medial letters A A E E I I O O U U EA OAJE EE OAE EI OAI E0 AUE EU OAUI IA AIE IO AUI IU UIE 0O OAU Final letters C LN D D F DT G G H RLN K GT 1,988,914 3 charqfters r Caps.N C /4 =74 M D B G S H (Z 5 P j, L 'r F L r: N Y N I SmaZL-nc? !8md bgs.h9zsptf01eny P DGS Type barsfor the first thirty-six letters are R R carried in theleft or fixed type basket segment. q s The remaining thirty-five letters are carried in the right or movable segment of type basket. Final l tt I This is done to provide for the throwing of two type bars simultaneously, one in' each segment T T of type basket as hereinafter set forth. V BIN Mounted in the frame A is a cross bar 1 (Figg DGT ure 1) which supports ashaft 2 on which is EST mounted a plurality of keylevers 3 provided Y with finger keys 4. Theforward ends of key 3 3 levers are guided in comb guide 5. The rearward ends of key levers extend rearwardly be- BG yond cross bar 1 and are engaged by springs Z: 2 2 6 which serve to retain key levers in normal position. Intermediate the cross bar 1 and the GN BLNG comb guide 5 is a cross bar 7 which supports WN NDGT a plurality of hell cranks 9. 'Each of said bell MB BNDG cranks is pivoted at. 8 and provided on its rear- MP LNG wardly'extending arm with pin 10. and on its GHT BNGT upwardly extending arm with pin 11, said pins NCE DSE being adapted to engage slots loaand 1111 re- TION DGST Spective1y I LDG Mounted abov key levers are a plurality of SS DST selector bars indicated'generally by the numeral LOGY LGY 12, varying slightly in design as required to per- BGT form the type selecting function and indicated The initial letter keys are adapted to be operated with the fingers of the left hand, the final letterkeys with the fingers of the right hand, and the medial letter keys with the thumbs. By using this method offlngering, it is possible for the operator to set up in the machine an entire word or syllable at one operation.

Should it be desired to write the word LIGHT the keys NR, (which write the initial L as shown in the above table of letters) are depressed by the fingers of the left hand, the medial key I by the right thumb, and the keys BNG'Il (which combination writes the final letters GHT as shown in the above table of letters) by the fingers of the right hand. These keys are all depressed simultaneously and upon the release of the keys, the machine is set in operation, writing they letters L I G H T in the proper order, which order is accomplished through the action of a timing means which releases the type bar actuating means for the types selected in a consecutive order from left to right, the type bars being arranged according to the order of their 'occurrence in the word.

Below is given the order in which type bars are arranged in the type basket; they being adapted to be actuated from left to right as hereinafter set forth. The lower line of characters represents the lower case letters, or the characters written by the machine when the platen is shifted to lower position. The upper line of characters represents the capital or upper case let'- ters, or the characters written by the machine when the platen is shifted to upper position. Each type bar has two letters or characters formed thereon, the small and the corresponding capital as shown below.

Caps."AGBSV#DPFTC/K$@ W J H Y M Q Small.-2agbs v3dpftc k4;wjhy, ,m 5 q Caps.-NZRLXOEIAUIEOT IRV B X 8: W L 0 Small.nzrlxoeiauieotfiirvbx'l w l o spring 2'7. On'the 'by placing spring tension specifically by the numeral 12 in combination with a letter. Said selector bars are slidably mounted at their forward and rearward ends in guides 25 and 26 respectively. Lying betweenselector bars and parallel thereto are auxiliary selector bars indicated generally by the numeral 19 and specifically by the numeral in combination with a letter. Said auxiliaryselector bars are provided according to the requirements of type selections and are mounted at their forward and rearward ends in lector bars.

Selector bars and auxiliary selector bars are provided with notches and projections on the edges thereof of the types 13, 14, 15, 16, and 28, said notches and projections being provided to perform certain functions according to the requirements of type selections and being specifically referred to by their respective numeral in combination with a letter.

Pivotally carried on each of said auxiliary selector bars 19 is a dog of the type 18 or 20, said dogs being provided to perform certain functions according to the requirements of type selections and specifically referred to by their respective number in combination with a letter. Dog 18 is provided on its forward end with the same manner as' setransverse head 22 adapted to make contact with selector bars12, said dog being normally held out of contact with selector bars by means of rearward end of dog 18 is provided shoulder 23 adapted to be acted upon by spring arm 1'? which is carried on selector bars 12 for the purpose of rendering dog active on the rearward end of said dog and raising the forward endinto contact with selector bars. Dogs of the type 20 are provided on their forward ends with transverse heads 22 and are adapted to make contact with a plurality of selector bars or auxiliary selector bars and are held in contact position by spring 21. e

' Mounted at the rear of frame A and above selector bars is a cross bar 29 which supports shaft 30 on which is mounted'a plurality of 'levers- 31.

On the lower end of each of said levers is pivotally mounted a selector arm generally indicated by the numeral 33 and specifically indicated by the numeral 33 in combination with a letter. Selector arm 33 is provided on its forward end with contact head 32 adapted to make contact with selector bars 12 and auxiliary selector bars 19. Carried on cross bar 29 is a plurality of 'springs 33 adapted to make contact with selector arms for the purpose of retaining selector arms in contact with selector bars. There is also provided springs 37, one for each selector arm, for the purpose of retaining selector arm in forward or normal position. On the upper end of lever 31 is pivotally mounted selector push bar 34 which is held in comb guide 35 by spring 36 and is adapted to act upon registering members of release rotor for the purpose of registering type selections in the manner hereinafter explained.

As hereinbefore set forth, the five vowel keys are designed to control the operation of eight .type bars giving a total of 14 vowels and special vowel combinations. The means by which this is accomplished is here set forth. For the sake of clearness and brevity the specification covers only a portion of the selections possible on the medial letter keys, the principles SBtIfOlth being extended to the entire keyboard.

When finger key 4 is depressed, key lever 3 is carried downward, imparting a downward motion to rearwardly extending arm of bell crank 9 by means of slot 10a acting upon pin 10, tipping bell crank rearwardly. Pin 11 acting in slot 11a moves selector bar 12 rearwardly in its mountings 25 and 26. The dotted lines in Figure 6 shows fully depressed finger key and the resultant positions of related parts. The first part of rearward movement of selector bar moves notch 13 under contact head 32 of selector arm 33, allowing contact head to drop down into notch as" shown by dotted lines in Figure 6. This establishes contact between selector arm 33 and selector bar 12 so that further movement of selector bar will move selector arm rearwardly, operating lever 31 and through push bar 34 registering the type selection in the manner hereinafter set forth. The operation for all single key letters is substantially the same as above set forth.

Letters or combinations of letters which do not appear on the, keyboard are obtained in the following manner. Should it be desired to write the vowel combination IU", which does not appear on the keyboard and which is written by the combination of keys U, I, and E as hereinbefore set forth, the finger keys for U, I, and E are depressed simultaneously. This action through means previously explained moves selector bars 1211, 121', and 12e rearwardly. The first part of this movement brings notches 281' and 28e of selector bars 121' and 12e into alignment with transverse head 22 of 'dog 181 and at the same time brings contact head 24 of spring bar 1711 carried on selector bar 1211 into contact with cam shoulder 23 of dog 181, rendering dog active by means of spring tension exerted by spring bar 1711 on shoulder 23 of dog. This raises transverse head 22 of dog '181' into notches 281' and 28a. Further movement of selector bars 121' and 122 will carry dog 181' rearwardly, thus moving auxiliary selector bar 191'. The second part of key movement brings notch 1311 under. head 32 of selector arm 3311, allowing selectorarm to drop into notch 1311, rendering selector arm active.

This also brings notch 131 under head 32 of selector arm 331' and notch 13:: under head 32 of selector arm 33c, but selector arms 331' and 33e are prevented from dropping into notches 131' and 13e by reason of notches 141' and 14c provided in auxiliary selector bar 191 moving from beneath heads 32 of selector arms 331' and 33e and allowing selector arm heads to rest on auxiliary selector bar, rendering said selector arms inactive and preventing the letters I and E from registering. This also moves notch 13:1: under transverse head 32 of selector arm 331:, allowing selector arm to drop into notch 13a: rendering selector arm active. It will be observed that these functions serve to establish contact between selector arms 3311 and 33a: and selector bars.

Further movement of finger keys carries selector arms rearwardly by means of contacts above explained. .The rearward movement of selector arms operates levers 31 and through push bars 34 registers type selections for the letters I and U in the manner hereinafter explained.

Should it be desired to write the vowel combination EA which does not appear on the keyboard and which is written by the combined action of keys 0, A, I, andE, the finger keys are depressed simultaneously. This action through means hereinbefore explained moves selector bars 120, 1211, 121', and 12e rearwardly. The first part of this movement brings notches 281' and 28c of selector bars 121' and 12e into alignment with transverse head 22 of dog 181 and at the same time brings contact head 24 of spring bar 1711 carried on selector bar 1211 into contact with cam shoulder 23 of dog 181', rendering dog active by means of spring tension exerted by spring bar 17a on shoulder 23 of dog, raising transverse head 22 of dog 181' into notches 281' and 28e. This movement also brings notches 28c and 28a of selector bars 120 and 1211 into alignment with transverse head 22 of dog 18c and at the same time brings contact head 24 of spring bar We carried on selector bar 12e into contact with cam shoulder 23 of dog 18c, rendering dog active by means of spring tension exerted by bar 17c on shoulder 23 of dog, raising transverse head 22 of dog 18c into notches 280 and 2811. Further movement of selector bars will carry dogs 18c and 181' rearwardly, moving auxiliary selector bars 19c and 191'. The second part of key movement brings notch 131' under head 32 of selector arm 331' and notch 13c under head 32 of selector arm 33c, but selector arms are prevented from dropping into notches 131' and 13e by reason of notches 14c and 141' provided in auxiliary selector bar 191' moving from beneath head 32 of selector arms 331' and 33c and allowing selector arm heads to rest on auxiliary selector bar, rendering selector arms inactive and preventing the letters I and E from registering. This movement also carries notch 130 under head 32 of selector bar 330, but selector arm 330 is prevented from dropping into notch by reason of notch 142 being moved from under head of selector arm 330 and allowing selector arm to rest on auxiliary selector bar 19c, rendering said selector arm inactive and preventing the letter 0 from registering. Notch 13.2 is moved under head 32 of selector arm 332:; allowing selector arm to drop into notch 132: and rendering selector arm active. Notch 13:: is also moved under transverse head 32 of selector arm 331:, but selector arm is prevented from dropping into notch 13:: by reason of notch 14:: provided in auxiliary selector bar 1912 beyond the periphery of said cylindrical section moving from beneath head of selector arm and allowing selector arm to rest on auxiliary selector bar 19e, rendering selector arm inactive and preventing the letter I from registering. Projection 16a is moved under head 32 or selector arm 33a, raising lug 32:: carried on transverse head of selector arm 33a into notch 14;! provided in auxiliary selector bar 195, so that further movement of between selector bars and auxiliary selector bars 19c, 19c, and 191' in the manner hereinbefore explained. Notches 131, 13g, and 1371. are moved into alignment with transverse head 22 of dog 20, making contact between selector bars and auxiliary selector bar 19u. Further movement of keys moves notch 13o beneath selector arm 33o'and notch 142 from beneath said selector arm, rendering said selector arm inactive and preventing the letter 0 from registering. Notch 132 is moved beneath selector arni33z allowing it to drop'into,

notch, rendering'said selector arm active. Projection 16a is moved beneath selector arm 33:2,, preventing contact with notch 13a and rendering selector arm 33a inactive, preventing the letter A from registering. Projection 15 on auxiliary selector bar 191; makes contact with selector arm 33a, rendering said selector arm active. Notches 14a and l4i are moved from beneath selector arm 332, preventing it from contacting with notch 131' and rendering selector arm 33: inactive, preventing the letter I from registering. These functions have served to establish contact between select-or bars and selector arms 332 and 331. so that further movement of finger keys will serve to register type selectors for the letters E and U.

The above specification of type selecting mechanism covers only a portion of the medial letters, but the principles set. forth are extended to the entire keyboard.

Extending transversely of machine in close proximity to rearward side of timer plungers 39 is a release rotor 38 adapted to be acted upon by selector push bars 34 and in turn to act upon timer plungers 39 for the purpose of tripping said plunger-s against timer balls 40. Said rotor is comprised of a plurality of cylindrical sections (Figure 14) corresponding in number to selector push bars 34, there being one for each type bar. Passing through said sections at right angles to the axis of said rotor is a slot 42 adapted to receive a slidable type registering member 43 adapted to be acted upon by selector push bars 34 for the purpose of registering type selections for letters or letter combinations set up on finger keys, said finger keys acting through the medium of selector mechanism as hereinbefore explained. Intermediate the ends of said slot an enlarged portion 42a is provided to receive a spring detent 44 having projection 44a which cooperates with notches 43a in slidable type registering member 43 for the purpose of retaining said type registering member in maximum forward or rearward position. The type registering member 43 is greater in length than the diameter of cylindrical section 41 and is designed to cooperate with spring detent 44a in such way that it is at all times projected either forwardly or rearwardly so as to form a lug thereon, said member being normally projected rearwardly.

In operation selector push bar 34 contacts rearwardly projecting end of slidable type registering member 43 and forces it into forward position,- in which position it is retained by spring detent 44. The forwardly projected end of type registering member43 forms -a lug adapted to act upon knee 45 of timer plunger 39 for the purpose of tripping it against timer balls 40 when release rotor 38 performs half revolution, said release rotor .being rotated one-half revolution for each operation.

Immediately above release rotor 38 and parallel thereto is a stationary member 46 presenting a concave surface toward said rotor, the forward edge of said member being closer to the periphery of rotor than the rearward edge. When said release rotor is rotated, the rearwardly projecting ends of slidable type registering members 43 are brought into contact with concave surface of stationary member 46 (Figure 16) and forced downwardly, projecting said type registering members on the opposite side of release rotor (Figure 17) so that when rotor has completed its one-half revolution all of said type registering members are projected rearwardly to again be acted upon by selector push bars 34. The ends of said stationary member 46 are secured firmly to side frame and provided with bearings 47 (Figure 3) in which end sections 48 of release rotor carried on the driven member 53 of a one-round clutch. 'By the action of the one-round clutch and throughthe medium of a two to one gear ratio the required half revolution of release rotor is effected.

The one round clutch is carried on the electric motor drive shaft 54 and is comprised of a loosely fitting driven member 53 and a driving member 55 keyed to motor drive shaft. Said driving member is provided with a recess 56 (Figure 9) in the face thereof adapted to engage contact head 57a of a spring actuated clutch dog 57 which is carried in a recess 58 cut in driven clutch member 53.. Clutch dog 57 has the form of a gib headed key with a gib on each end. Between the inner face of contact head 57;: and the end of operating slot 58 is interposed a spring 59 which constantly tends to move dog into engagement with driving clutch member 55. There is provided a clutch throw-out lever 60 (Figure 10) adapted to engage contact head 57b of clutch dog 57 and hold it against movement. Clutch throw-out lever 60 is pivotally mounted on bracket 66 (Figure 3) carried on rear frame and is provided with a wedge shaped cam face 60a of arcuate form adapted to engage contact head 57b of clutch dog 5'7 and cam it out of engagement with driving clutch member 55. At the thick end of said cam face is provided a stop lug 60b extending beyond said cam face in such manner as to come in the path of the actuating head 57b of clutch dog 57 v and arrest the movement of driven clutch mem- ,60 an arcuate flange 60c'which presents an ear adapted to be engaged by hook 61a on trip on pawl 61- carried on the rearward extension of universal bar 62. There is provided in flange portion 600 of clutch throw-out lever 60 a downwardly extending spring guide 63 adapted to be received at its lower extremity by a forwardly extending arm 61b of trip ofi pawl 61. Carried on spring guide intermediate the flange portion of clutch, throw-out lever and the forwardly extending arm of trip off pawl is a compression spring 64 adapted to retain throw-out lever 60 in contact position. There is also provided on trip off pawl 61 an upwardly extending portion 61c adapted to come in the path of actuating head 57b of clutch dog 57 in such way that when driven clutch member is revolved the side of actuating head 57b of clutch dog will strike said upwardly extending portion and move trip oif pawl 61 rearwardly, disengaging hook 61a from ear 600 on clutch throw-out lever and allowing clutch throw-out lever 60 to be returned to normal posi tion by the action of spring 64.

The universal bar 62 on which trip-off pawl 61 is carried is pivotally mounted near its center to side frame and is adapted to make contact at its forward extremity 62a with key bars 3 in such way that the movement of key bars will carry forward end of universal bar downward. This action turns universal bar on its pivot, raising trip-off pawl 61 into contact position allowing hook 61a to engage car 600 of clutch throw-out lever 60. When finger keys are released, universal bar is returned to normal position by reason of spring 65 provided at its rearward extremity. This action moves trip-off pawl 61 downward, which, being engaged with clutch throw-out lever 60, moves it out of engagement with actuating head 57b of clutch dog 57, allowing it to make contact with driving clutch member 55. The rotation of driven clutchmember 53 carries actuating head 57b of clutch dog against the upwardly extending portion 610 of trip oif pawl 61, 'disen gaging hook 61a from ear 600 of clutch throwout lever 60, allowing it to be returned to contact position by spring 64. Further rotation of driven clutch member brings actuating head 57b of clutch dog into contact with cam face 600. of clutch throw-out lever, camming clutch dog 5'7 out of engagement with driving clutch member 55 at which time actuating head 57b of clutch dog comes into contact with lug 60b of clutch throwout lever arresting the movement of driven clutch member. This action has effected one-half revolution of release rotor 38, tripping all selected timer plungers 39 down against timer balls 40 and also resetting letter registering members 43 as hereinbefore explained.

There is provided a timing mechanism adapted to receive the type selections registered on the release rotor 38 and in turn to distribute said selections consecutively to type actions through' actuating cams 71 of corresponding type bars. Said timing mechanism is comprised of a series of vertical plungers 39 arranged in parallel array extending transversely of machine. (Figure 12) and carried in two independent units conforming to the two type basket units, the left unit spanning the left half of the machine and controlling the type bars carried in the left type basket segment and the right unit spanning the-right half of the machine and controlling the type bars carried in the right segment of type basket. The two units of timing mechanism are synchronized so as to operate in harmony one with the other in such way that two type bars may be thrown simultaneously, one in the left type basket segment and one in the right type basket segment. Timerplungers 39 are slidably mounted at their upper and lower ends in guides and 66 respectively which are secured to side frames. Provided in the lower guide bracket 66 is a ball race 6'7 in which is carried a double row of interlocking balls 40 adapted to coact with the timer plungers 39 as hereinafter explained. Should it be desired rollers may be usedinstead of balls the rollers being adapted to be acted upon by the timer plungers in exactly the same manner as the balls; however, balls are preferable.

A construction employing the rollers instead of the balls is not disclosed in the drawings for the reason that the general construction is the same in both constructions and both employ the same principle of operation.

On the lower end of each timer plunger 39 is provided a straight finger 39a (Figure 13) adapted to pass between timer balls (Figures 8 and 11) and an offset finger 39b adapted to rest on timer balls as shown in Figure 11. To the forward portion of timer plunger is pivotally mounted a connecting link 68 which connects plunger to actuating cam release lever 69. Actuating cam release lever 69 is pivotally mounted on actuating cam bracket 70 and has a forwardly extending arm 69a on which is carried a roller 69b adapted to run in roller race He provided in face actuating cam '71.

Actuating cam 71 (Figure 15) is provided with a rock block 710, loosely carried on an extending hub 71b of actuating cam. A compression spring 710 is interposed between a radially extending projecting portion of rock block 71a and a corresponding support 7111 in the face of actuating cam. The opposite end of rock block extends outwardly and forms the side of a radial portion of roller race 711;. When in neutral position, a fiat 71) on the periphery of actuating cam is presented toward power roller 72, breaking contact between power roller and actuating cam.

When timer plunger 39 is tripped and offset finger 39b rests on balls 40, the cam release lever 69 is in the position shown in Figure 16 and rock block 71a is about to escape from release roller -When timer ball 40 is allowed to move from beneath offset finger 39b, timer plunger 39 moves downward into extreme actuated position, (Figure 17) and rock block 71a is allowed to escape from release roller. There is provided on cam bracket i '70 a spring lever '73 with torsion spring 74 which constantly forces lever against pin 71g projecting from side of actuating cam. This action constantly tends to move actuating cam into contact with power roller 72 so that when rock block escapes from release roller, cam is moved into contact position. When cam 71 has completed one revolution and effected a corresponding type action, the flat face '71! is presented toward power roller '72 and the rock block Ila. makes contact with roller 69b carried; on release lever 69, arresting the movement of cam. The spring 710 provided on the opposite end of rock block serves to cushion the contact of roller 69b with rock block 71a. The movement of release lever 69 effected by roller race 71c in face of actuating cam '11 acting upon roller 69b has served to-return timer plunger 39 to normal position.

- Provided at the extreme left end of both the left/ and right ball races 67 is a wedge shaped timerball reset plunger '75 (Figures 3 and 8) which passes between the balls and the left end of ball race. when ball reset plungers '15 are moved downward, the enlarged portions of said plungers force timer balls to the right so that openings between ballsare in the proper position to receive straight fingers 390 provided on timer plungers 39. The release rotor 38 is provided with suitable lugs 38a (Figure 3) to engage the rearwardly extending ends of ball reset plunger arms '16 for the purpose of forcing said reset plungers downward ,and resetting balls in the manner above explained.

Assuming that selections have been registered on release rotor 38 calling for a multiplicity of type actions, when finger keys 4 are released,

tion, which'is accomplished by means of the gear train and one-round clutch hereinbefore explained. This action carries timer ball reset plungers Z5 downward, resetting ti'mer balls 40. At the same time release rotor trips selected timer plungers 39 down against timer balls 40,'the straight finger 39:: passing into spacesbetween balls and the offset finger 39b resting on the top and to the right of center of timer balls (Figure 11) It be observed that so long as ball reset plungers 75 remain in a downward position, timer plungers 39 are prevented from moving into extreme actuated position'and thereby releasing actuating cam by reason of timer balls 40 being retained under offset fingers 39b of timer plungers.

' preventing any other tripped timer plungers from moving downward and releasing other actuating cases while the first cam is in operation. When actuating cam hascompleted one revolution and efiected a corresponding type action, timer plungor is returned to normal position as previously elained. The resulting withdrawal of straight or 89a of timer plunger from balls allows the hall underthe onset finger 39b of the next tripped timer plunger to the right to move to the left sumciently to allow plunger to move downward into extreme actuated position, releasing the correspending actuating cam, and so on until alltype selections have been printed. The above described action may take place simultaneously in both right and left timer units, making it possible for two type bars, one in the left and one in the right type basketv segment to be actuated at the same time.

Extending transversely of frame and located between type bar actuating cams and timer plungers'is the power roller '72 supported in bearings '38 carried on side frame of machine. The power drive of said roller is effected through the medium of a V belt 79 connecting drive pulley 89 carried on motor drive shaft 5 1 with a corresponding policy 81 carried on power roller. In operation power roller is adapted to run continuously and transmit driving power to actuating camsthrough friction contact.

The type bar actuating mechanism is comprised of a type bar actuating earn as hereinbefore described, the connecting linkage, and the type bar assembly. Extending transversely of frame and attached-thereto is a bar 82 upon =ried on the rearward end of type bar.

which the supporting brackets of the type bar actuating cams are mounted. Each bracket carries a type bar actuating cam 71 with its respective spring lever '73 and release lever 69. Saidactuating cams are arranged in two banks mounted one above and one below the supporting bar 82, said bar is mounted just forward of power roller 72 and serves to hold the cams in correct relation thereto. h

There is provided on each of said actuating cams a crank pin 7171. (Figure 15) on which is mounted a connecting arm 83 which serves to connect crank pin with swingable link 84 depending from a bracket 85 carried on the forward portion of frame. Toa forwardly extending arm 84a of said swingable link is attached a type bar actuating link 86 which extends upward and is attached at its upward end to type action, and serves to transmit operating motion thereto. The type action is comprised of a reciprocating type bar 87 (Figure 1'7) having upper and lower case types formed on the usual type head 88 car- Besides the type head, other essential parts of type action are a bell crank 89 pivotally mounted on hanger 90 and connected to upper end of actuating bar 86, a type bar carrier arm 91 pivotally connected at its lower end to type action hanger 90 by means of a sublink 92, the upper end being connected to the forward end of type bar 87, a weighted toggle 93 connecting bell crank 89 to central portion of type bar carrier arm 91, and a type bar guide link 94 depending from type action hanger; The rearward side of type basket, frame is provided with comb guides 95 to receive the rearward end .of'type bars. Each of said type bars isprovided with a slot 37a passing lengthwise thereof and adapted to receive pin 96 provided in comb guide for the purpose of supporting the rearward end of type bar against vertical movement. The aforementioned weighted toggle carries a weight 93a on the upper portion of forward link and is provided with a pin 93c and a slot 93b for the purpose of limiting the turning movement of toggle links about pivot. A spring 93b is provided for the purpose of retaining toggle in retracted position.

In operation the type bar actuating cam 71 is rotated by means of power roller 72, moving connecting arm 83 carried on crank pin 71h rearwardly, which pullsthe forwardly extending arm 84a of swingable link 84 through actuating link 86. This action moves the downwardly extending am of bell crank 89 rearwardly. The weighted toggle 93 being limited in its turning movement about toggle pivot by means of pm 930 and slot 93d serves as a push link between bell crank and type bar carrier 91. The rearward movement of downward extending arm of hell crank carries type bar carrier 91 rearwardly byreason of push link action of toggle 93. This action through V connection of type bar carrier 91 to forwardend of type bar 87 projects type bar rearwardly toward printing center, the depending guide link 94 coacting with type bar carrier 91 and sublink 92 in such way as to give an approximate straight line movement to the forward end of type bar, the rearward end being guided by pin 96 in slot 874:. When type bar actuating cam is in its extreme actuated position, the type bar and connecting linkage are in the position shown by dotted lines in Figure 1, being carried to this position by actu- 15p ating cam. The momentum of the type bar supporting linkage together with the momentum of weight 93a on forward link of toggle 93 serves to straighten toggle joint and carry type bar into printing position as shown in Figure 1'7. The return of actuating cam to normal position retracts the type bar, spring 9317 serving to retract toggle 93.

There is provided a type basket located on the top of the forward portion of frame in front of the platen in such a wayas to place writing centers in full view of operator. Said typebasket consists of two segmental units, right and left, having separate but similar frames. Each of said frames is formed of a sheet metal band 9'7 (Figure 2), the front of which is of arcuate form, the sides extending rearwardly therefrom approximately along lines radiating from writing centers, and serving to connect said arcuate front to comb guide 95 which forms the rearward portion of said frame. The forward end of type action is secured to arcuate front of type basket frame by means of type action hanger 90, the rearward end of type action passing through comb guide 95 and being supported by pins 96.

The left segment of type basket is secured at the front to the frame of machine and at the rear to a cross member 98 extending transversely of machine and secured to the side frame. Said left type basket segment being rigidly mounted to frame has a fixed writing center 99 (Figure 18) which is more definitely determined by a fixed type guide 100 secured to frame in close prox imity to platen. The type bars carried in said left segment of type basket radiate from fixed writing center 99 in arcs struck in both vertical and horizontal planes. said type bars being arcuately arrayed in three tiers radiating from said fixed writing center.

The right segment of type basket is movably mounted on a track 98a (Figure 2) running transversely of the frame and parallel with carriage track, said type basket track being formed on the cross member 98 to which rearward portion of fixed type basket segment is secured. To the lower side of right segment of type basket are attached lengths of track 103 provided with races ed in a bearing 106 forming a support and being attached to right front comer of typewriter frame. This rod serves as a support for the front of type basket and ,reeeives the component of the force imparted thereto by the power means operating the type bars of said segment. Between a collar 107 provided about the central portion of rod 105 and fixed support 106 is interposeda spring 107a. The extreme right end of the forward track 103 carried on said type bas- Springs 107a and 109 tend-Eonstantly to move the type basket to the left against suitable stops and thus retain it in normal position.

The right type basket segment being movably mounted as before explained has a movable writ-.

ing center 101 (Figure 18) which is more defitached to the rearward right corner of movable segment; said type guide is carried in close proximity to the platen and establishes the writing center in the same horizontal plane as the aforesaid fixed type guide of the left type basket segment. The type bars carried in the right segment of type basket radiate from writing center in the same manner as type bars carried in left type basket segment. The right type basket segment being movable transversely of the frame and parallel to the platen and carrying movable type guide, it is therefore obvious that as the right type basket segment is moved to the right, its respective writing center is also moved parallel along platen (see Figures 19 and 20) The divided type basket is provided for the purpose of allowing the simultaneous operation of two type bars. The type bars carried in the fixed segment write the initial letters of a word and the type bars carried in the movable segment write the final letters. To illustrate: Should it be desired to write the word CHURCH, selections for all types are made with one finger operation as hereinbefore explained. The letters CHU are written with left type bars and the letters RCH with the right type bars. The right segment of type basket is automatically carried to the right three spaces, moving the writing center of type bars carried in said segment an equal number of spaces to the right. Upon the release of the finger keys both the right and left type bars begin operating at the same time. The letter C is written on the left and three spaces to the right-the letter R is written, thus: CR. The second type action writes the letters H and C, thus: CHRC-. The third type action completes the word, thus; CHURCH. Thus the word is written in only half the time required where only one type bar is thrown at a time. The advantages of such an arrangement are obvious.

Located centrally between the two type basket I segments and extending from the front of typewriter frame to a point near the carriage rack is a shaft 110 carrying gears 111, 112, 113, and 114, all'of which are fixed to a shaft. The front and rear ends of shaft 110 are joumaled in bear ings supported by frame. Attached to the front and rear of lower left side of right movable ty e basket segment are two short racks 115 and 116 which extend transversely of the machine frame and lie parallel to the line of movement of movable type basket segment. The underside of said racks are provided with teeth adapted to mesh with gears 111 and 112 of the aforesaidshaft assembly. Gear 113 of said assembly is adapted I to be acted upon by a rack 117 (Figure 24) which is actuated by a specially designed type basket spacing mechanism as hereinafter described. The action of rack 117 on gear 113 imparts a turning movement to shaft 110 which is transmitted to gears 111 and 112 carried on shaft 110.

The action of these gears on type basket segment racks 115 and 116 moves said type. basket segment to the right. a

The type basket spacing mechanism is located on the left side of machine, being secured to typewriter frame on the lefttend and extending to the right beyond the center of machine and secured to prised of a head 118a of suitable thickness which tapers abruptly to a thin shank 118b (Figure 24), the difference in thickness of said plunger head and shank being equal to one letter space. Interposed between plungers 118 are slidable spacing blocks 119 supported in a channel frame 120 which retains said slidable blocks against vertical and lateral movement, but allows movement in a line of travel'parallel with the movement of movable type basket segment. Said supporting channel is'securely mounted to-the left side of frame at one end, the other end being secured to upper frame and provided with a slidable follow block 121 having asquare end loosely fitting the interior of channel, the other end terminating in a round portion 121a upon which is carried a compression spring 122 and which is slidably mounted in a suitable bearing 123. One end of said spring bears against bearing, the otherbears against enlarged head of follow block, thus tending to force follow block to the left against the alternate series of spacing blocks 119 and wedge shaped spacing plungers 118. There is provided a type basket spacing rack 117 which is attached to the forward side of follow block 121 by means of a screw 124 passing through a slot 125 carried in type basket spacing rack 117. Carried on type basket spacing rack is a projection 171a (Figure 2) to which is attached a spring 126, the other end of which is attached to a similar projection 172 on spacing mechanism housing 120. Spring 126 serves to retain spacing rack 117 in normal position. Said spacing rack is of the same pitch as the aforesaid racks attached to type basket segment and carries on its upper side a plurality of notches of buttress form and of the same pitch as the aforesaid rack teeth,- each of said teeth being equal to one letter space. The right end of said rack is supported in suitable bearing 129 carried on type basket 4 supporting member 98, the left end of said rack being supported by screw 124 passing through slot 125 and slidably securingsaid rack to follow block 121. Above said rack and supported on frame is a dog 127 adapted to engage buttress notches provided in the upper side of type basket spacing rack 117 when said'i ack 'is moved to the right as is the case when typebasket spacing plungers 118 are forced betweenspacingv blocks Attached to shank 11817 of type basket spacing plungers is a connecting link 128 which is fastended on its lower end to an auxiliary plunger 130 (Figure 13) coacting with timerplungers 39 of left timer unit for the purpose of actuating said type basketspacing plungers, there being an auxiliary plunger for each timer plunger co'ntained in left timer-unit. Each of said' auxiliary plungers-is adapted to be carried in upper and lower guides and 66 and in the same manner as timer plungers, and is provided with a forwardly extending portion 130a to which is attached type basket spacing plunger connecting 128. On the lower rearward portion of auxiliary plunger 130 is provided a projecting lug- 130b adapted to make contact with knee.

45 of left timer-plunger 39 forthe purpose of tripping the coacting timer plunger, the release rotor 38 acting upon the lug 13Gb of auxiliary the operation of type bars carried in the left segment of type basket, the release rotor 38 is revolved, thereby tripping the timer plungers 39 and auxiliary plungers 130' in the manner hereinbefore explained. Each auxiliary plunger tripped carries its corresponding type basket spacing plunger 118 down between spacing blocks 119. causing the spacing mechanism to be lengthened a number of spaces equal to the number of spacing plungers forced downward between spacing blocks minus one. To illustrate: If a four letter combination be set up which involves the operation of type bars carried in the left segment of type basket, the type basket spacing mechanism is lengthened three letter spaces to the right, the width of one space being required to take the lost motion out of the mechanism, said letter space amounting to the displacement of one type basket spacing plunger, the remaining three aforesaid plungers serving tolengthen the spacing mechanism. Asthey are forced downward between spacing blocks, the movable end of spacing mechanism carries follow block 121 to the right, which in turn moves type basket spacing rack 117 to the right through the action of screw 124 bearing against end of slot 125 provided in spacingrack 117. The dog 127 drops behind each notch as it passes beneath said dog in a forced upward to normal position by the return of timer and auxiliary plungers to rest position.

However, the follow block 121-by reason of the spring pressure exerted on it by spring 122 is returned to normal position as spacing plungers are forced upward to normal position, it being free to move to normal position by reason of loosely fitting screw-124 sliding in slot 125 provided in type basket spacing rack 117. On the outer end of rounded portion 121a of follow block which projects beyond bearing support 123 is carried a camming member .131 which upon its return to normal position passes under inclined projection of dog 127, and tends to raise dog out of engagement with notches on type basket spacing rack 117. As dogescapes from notch of type basket spacing rack, said rack is returned to normal position by action of spring 126, the movable type basket, segment being returned to normal position at the same time by the action of springs 107a and-109.

There is provided a platen positioning mechanism for the purpose of setting platen in proper writing position to fixed type basket writing centerafter selections have been written requiring the operation of type bars carried in movable type basketi segments as follows: On the end of type basket spacing rack locking dog 127 which extends to the left beyond its fulcrum point 1270 is provided a slot 127a designed to engage a slender projection 132a (Figures 25 and 28) of a bell crank 132 pivoted on a support 133 carried by main mechanism' The lower end of-said bell crank carries a pin 132b' projecting from the side and engaging an L shaped slot 134a provided in forward'end of escapement rack yoke 134. The escapement rack 135 is carried on the platen carriage, being swingably mpunted and normally held in mesh with gear wheel 137 of escapement mechanism by'two opposing springs 136 (Figure 21) one located on each side of said rack. Extending at right angles to and below escapement rack is provided yoke 134, having projections 1341) and 1340 extending upwardly'on either side of escapement rack 135. Yoke 134 serves to move supporting 'bracket 129 .of type basket spacing rack 135 from off gear 137 carried on escapement wheel shaft and on to the fourth and end most gear 114 of type basket spacing shaft assembly. The aforementioned yoke is swingably mounted by means of links 138 and 139 depending from frame and attached at' their lower ends to the ends of a swingable cross member 140. Cross member 140 has two projections extending upwardly, the forward projection 140a forming a pivot for the yoke 134, said pivot being near the center of yoke. The rearward projection 14% of swingable cross member carries a loosely pivoted lever 141 of the first order, the forward end of which is pivoted to the rearward end of yoke 134. The rearward end of said lever has attached thereto a spring 142 which extends forwardly and is mounted at the pivot of yoke 134. Said spring exerts sufficient force to normally restrain forward end of yoke in an up or down position as it has been placed by mechanical means.

For the purpose of placing 'yoke 134 in downward or contact position there is provided rock shaft 147 (Figure 3) placed immediately to the front of timer plungers and extending transversely of frame the entire length of right timer unit. Rock shaft 147 is provided with actuating bail 146 which is adapted to make contact with forwardly projecting lugs 39c carried on timer plungers 39 of the right timer unit. Said rock shaft is also provided with a rearwardly extending arm 149 to which is attached the lower end of spring 145, the upper end being attached to the forward end of yoke 134. Provided on rock shaft is forwardly extending arm 150 provided on its forward end with pin 150a adapted to work in slot 151a provided in yoke stop lever 151. The lower end of stop lever 151 is pivotally mounted on suitable bracket at 148 and is provided with spring 152 which serves to retain said stop lever in normal or forward position. The upper end of stop lever is provided with stop pin 1512) which is adapted to make contact with forward end of yoke 134 for the purpose of locking yoke against forward movement.

For the purpose of returning yoke 134.to normal position when it has been moved into contact position, there is provided a lever 143 (Figures 25 and 26) of the first order pivotally mounted on supporting member 129, spring 144 serving to retainv lever in normal position. Provided on type basket spacing rack 117 is a downwardly extending arm 117b adapted to act upon beveled end of lever 143 for the purpose of forcing it downward into position shown in Figure 25. The opposite end of lever 143 makes contact with the forward end of yoke 134 and raises it into normal position as lever 143 is turned on its pivot by the action of arm 117b on beveled portion of said ever.

In operation, assuming that type selections have been made req iiring the operation of a greater number of type bars in the right type basket segment than in the left, the corresponding timer plungers and auxiliary timer plungers are tripped by the action of release rotor as hereinbefore explained. This action through means before described spaces movable type basket segment to the right the required number of spaces. As' type basket spacing rack 117 is moved to the right, dog 127 is brought into engagement with notches on upper edge of rack by the action of spring 127b, locking rack against movement to the left. This retains movable type basket segment in spaced position. Projection 390 provided on right unit timer plungers acts upon actuating bail 148 of rock shaft 147 and moves it into position shown by dotted lines in Figure 21. The action of pin 1500. in slot 151a provided in stop lever 151 moves stop lever into rearward position, stop pin 151b coming into contact with forward end of yoke 134. This serves to lock yoke 134 against forward movement until all tripped timer plungers of right timer unit have been returned to normal position. When rock shaft 147 has been moved nto actuated position, tension is placed on spring 145, which being attached to the forward end of yoke 134 tends to pull downwardly on said yoke. The action of spring 127b in bringing dog 127 into contact with type basket spacing rack 117 raises the end of dog carrying slot 127a, which acts upon slender projection 132a provided on bell crank 132, turning bell crank on its pivot 133. This action carries pin 13217 rearwardly in slot 134a. When pin 13212 is brought under the vertical portion of slot 134a, the forward end of yoke 134 is allowed to drop downward in response to spring 145. This raises the rearward end of yoke 134, which, acting upon lever 141, trips said lever into position shown in Figure 27, said lever and yoke being retained in tripped position by spring 142.

When type actions have been completed in left segment of type basket, spacing plungers 118 are returned to normal position, allowing follow block 121 to be returned to normal position by the action of spring 122. The camming member 131 carried on rounded portion 121a of follow block is brought into contact with beveled end of dog 127. This action tends to raise dog out of engagement with type basket spacing rack 117. Dog 127 is prevented, however, from raising out of engagement with spacing rack 117 by the action of stop lever 151, which prevents yoke 134 from moving into forward position and through the medium of bell crank 132 which has contacted yoke 134 by means of pin 1321) engaging the upper portion of L slot 134a in the manner shown in Figure 27 prevents any action of dog 127. When type selections in right type basket segment have been written, timer plungers 39 are returned to normal position allowing rock shaft 147 to assume its normal position. This returns stop lever 151 to normal position, releas-' ing yoke 134 allowing it to move into forward position (Fig. 28) in response to action of camming member 131 on dog 127, this action being transmitted to yoke 134 by means of bell crank 132, pin 132b acting in vertical portion of slot 134a serving to establish the proper contact for moving said yoke.

The moving of yoke 134 brings projections 1340 into contact with rearward side of escapement rack 135, moving it out of mesh with escapement gear 137 and into mesh with gear 114 which is carried on type basket spacing shaft 110. With escapement rack 135 engaging type basket spacing shaft gear 114, it is obvious that as type basket is moved to left, platen carriage will be moved to the left an equal distance and vice versa. When movable segment of type basket has returned to normal position, the platen being carried with it is in the proper position to receive further type actions from either the left or right type bars. As type basket returns to normal position, projection 117?) makes contact with trip lever 143 and returns it to normal position (Figure 25), which action raises the forward end of yoke 134, tripping yoke back to normal position and disengaging it from pin 

